Solder for soldering foils of aluminum and aluminum alloys



' Patented Nov. 30, 1943 I tin. ioys. The melting is suitably performed in crucibles,

. another by applying a solder comprising bismuth, down to a thinness of about 75 inch can be 7 her: At first the silver is melted and afterwards UNITED STATES PATENT OFFICE SOLDER. FOR SOLDERING FOILS OF ALUMI- NUM AND ALUMINUM ALLOYS Fred Strasser, Basel, Switzerland, assignor to Alexandre Clavel, Basel, Switzerland No Drawing. Application August 11, 1942, Serial? No. 454,404. In Switzerland May 6, 1942 1 Claim. (Cl. 75-134) The present invention relates to a solder for are added cadmium, lead, bismuth and at last soldering foils of aluminum and aluminum al- A process for using the solder of the invention 7 for instance graphite crucibles, and the molten consists in that foils of aluminum and aluminum a alloy is afterwards poured'into metal moulds. alloys to be soldered are placed upon a heated Upon a base heated up to 90 degrees Celsius base whereon the foils are soldered with one aluminum foils and foils of aluminum alloys lead, tin, cadmiumand silver. soldered by applying the above described solder" The object of the invention is the provision l WhatIclaim is: I of a solder having the following quantitative eon- Solder to be used for soldering foils of alumistitution in parts by weight: bismuth 500 to 550 num and aluminum alloys w h n h v parts, lead to 120 parts, tin 180 to 200 parts, having the following quantitative constitution in cadmium parts and silver 50 parts. parts by weight: bismuth 500 to 550 parts, lead The production process of the solder can be 15 60 to parts, tin to 200 parts, cadmium 80 performed, for instance, in the following manparts and silver 50 parts.

. FRED S'I'RASSER. 

